Determination of metal ions extracted by DTPA in a soil treated with effluent using an Hg-electroplated-Pt microelectrode

被引：3

作者：

de Toledo, Renata Alves ^{[1
]}

Simoes, Marcelo Luiz ^{[1
]}

Lopes da Silva, Wilson Tadeu ^{[1
]}

Martin-Neto, Ladislau ^{[1
]}

PedroVaz, Carlos Manoel ^{[1
]}

机构：

[1] Embrapa Instrumentacao Agropecuaria CNPDIA, BR-13560970 Sao Carlos, SP, Brazil

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2009年 / 89卷 / 15期

关键词：

treated effluent; soil; micronutrients; Hg-electroplated-Pt microelectrode; square wave anodic stripping voltammetry; square wave voltammetry; ATOMIC-ABSORPTION-SPECTROMETRY; STRIPPING VOLTAMMETRY; TRACE-METALS; PB; ZN; CD; CU; ACID; AVAILABILITY; FRACTIONS;

D O I：

10.1080/03067310903094487

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Determinations of Cu, Fe, Mn and Zn were performed in an oxisol soil treated with effluent originated from a biodigester septic cesspool. The extracts were obtained from a DTPA/TEA (pH 7.3) solution and analysed by electroanalytical methodologies using square wave anodic stripping voltammetry (SWASV) for the analysis of Cu, Mn and Zn and square wave voltammetry (SWV) for Fe analysis, both of them with a thin mercury film microelectrode (ME-Hg). DTPA (diethylenetriaminepentaacetic acid) complexes with Cu, Mn and Fe show electroactivity in the potentials range close to the ones for the free ions in solution, but the Zn complex did not show any electroactivity at the potential range analysed. SWASV/ME-Hg and SWV/ME-Hg results were in good agreement (r2 = 0.996) with the flame atomic absorption spectroscopy (FAAS) analyses, demonstrating that electroanalytical methodologies can be used for micronutrient determinations in soil extracts without serious interferences of the matrix components. Some characteristics of the complex formed between DTPA-metals are explored by EPR experiments.

引用

页码：1099 / 1111

页数：13

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